A German guy approaches a prostitute and says,"I vish to buy the sex with you." "Okey doke,"says the whore,"but i'll charge 100 euros an hour." "Ist goot,but i must varn you,I am a little kinky." "No problem,"she replies cautiously,""I can do a little kinky." So off they go to the girl's flat,where the german produces four large bedsprings and a duck caller. "I vant you to tie ze springs to each of your limbs." The hooker finds this very strange,but complies,fastening the springs to her hands and knees, in hope that she'd get a good tip for the craziness involved. "Now you vill get on your hans and knees!"shouts the odd kraut. The prossie duly does this,balancing on the springs. "You vill please blow zis vistle as i make love to you" The poor hooker finds all this very odd,but goes for it anyhow. Oddly,the sex is fantastic. She is bounced all over the room by the energetic german,all the time honking on the duck caller. The climax is the most sensational she has ever experienced, and it is several minutes before she has recoverd her breath. Finally she gasps,"that was totally amazing-tell me,why did that feel so good?" "Ah" the german says,"it's the four- sprung duck technique."